The Winterforce LT is Firestone's Light Truck/SUV Studdable Winter / Snow tire designed for the owners of medium- and heavy-duty commercial vans, SUVs and pickup trucks. Available in Load Range E (10-Ply Rated) sizes, Winterforce LT tires are for drivers looking for traditional wintertime traction on dry, wet and snow-covered roads.Firestone Winterforce LT winter / snow radials feature a winter tread compound molded into an aggressive directional tread pattern with tread blocks that are siped and can be studded to offer the biting edges necessary to provide traction in snow and on ice. Independent tread blocks feature high-density siping to enhance grip in loose snow while the intermediate and shoulder tread blocks are molded to accept studs that further enhance traction on hard-packed snow and ice. The tire's internal structure includes twin steel belts on top of a polyester casing to combine strength with ride quality.Winterforce LT winter / snow tires meet the industry's severe snow service requirements and are branded with the three-peak mountain snowflake (3PMSF) symbol.Install Winterforce LT tires in sets of four only.Pinned to accept optional TSMI #15 blue-colored metallic winter studs. Related Information: What is the three-peak mountain snowflake symbol (3PMSF)?